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8512016 Positive-displacement dry pump  
The present invention provides a dry pump including: a center cylinder which includes: a plurality of pump chambers containing an upper stage pump chamber that communicates with an intake port and...
8511277 “Turbomotor” rotary machine with volumetric expansion and variants thereof  
A “TurboMotor” positive displacement rotary-piston machine comprises a casing having an annular working chamber and intake and exhaust ports, two drive shafts coaxial with the annular surface def...
8512017 Compression mechanism and scroll compressor including the same  
A compression mechanism is configured to be used in a scroll compressor. The compression mechanism includes a fixed scroll and a movable scroll. One of the fixed scroll and the movable scroll is a...
8512018 Gear pump with pressure relief groove  
A hydraulic device has an inlet side and an outlet side and includes two meshing cogwheels. Each cogwheel has external oblique teeth and is arranged between an inlet side and an outlet side. At...
8512006 Hydraulic pump with variable flow and pressure and improved open-loop electric control  
The present invention is a variable displacement pump system for delivering precisely controlled oil flow and pressure, including a variable displacement pump having an inlet passage, an outlet...
8512019 Screw compression apparatus  
In a screw compression apparatus in which shaft sealing members (13, 14) isolate a bearing space (7, 8) from a rotor chamber (5) and a lubricating fluid separating collector (3) separates the rotor...
8510968 Turbine and air knife assembly  
A paint drying booth includes a plurality of walls, a ceiling, and an access door for egress and ingress. A turbine generates heated compressed air which is delivered to the interior of the booth...
8505703 Eccentric gearing type clutch  
An eccentric gearing type clutch includes a housing connected to, and for rotation with, a drive shaft; at least one set of rotors, each set of rotors having two parallelly arranged rotors...
8506269 Low noise type balance shaft module  
A balance shaft module equipped with a dual pump including a main oil pump and a sub-oil pump may include a pump rotor rotatably coupled to a housing, a discharge space formed in the housing for...
8506271 Scroll machine having axially biased scroll  
A compressor includes a shell, a compression mechanism, and an axial biasing system. The shell defines a first passage forming a first discharge passage. The compression mechanism includes first...
8506270 Variable displacement vane pump  
A variable displacement vane pump including a relief valve which includes a valve bore, a spherical valve element in the valve bore, a valve seat fixed onto one axial side of the valve bore and...
8506272 Scroll compressor lubrication system  
A lubricant metering system for a compressor may include a cap, a cap cage, and a shaft. The cap may include an outer surface, a first recess, and a first radial bore extending between the first...
8506263 Vacuum pump  
A vacuum pump is provided comprising a pumping mechanism, a drive shaft for driving the pumping mechanism and a gear box connected to the drive shaft for rotating the drive shaft. Pressure control...
8500424 Screw compressor with a sound dampening device that separates lubricant  
In order to improve a screw compressor comprising an outer housing, a compressor screw housing which is arranged in the outer housing and in which rotor bores for screw rotors are arranged, a drive...
8500414 Method of controlling a gear pump as well as an application of the method  
A method of controlling a gear pump comprising two meshing gear wheels (11, 12), wherein the two gear wheels (11, 12) are driven via respective shafts (2, 3) each by a drive unit (7, 8). A current...
8500423 Frame rotated hydraulic motor with improved parking brake  
A rotary fluid pressure device includes a gerotor gear set having a ring gear and a star gear orbitally moveable about a longitudinal axis relative to the ring gear. The star gear includes an...
8500422 Vacuum pump  
A vacuum pump housing comprises first (12) and second half-shell stator components (14) defining a plurality of pumping chambers separated by partition members (26, 28, 30, 32). Each pumping...
8500425 Roots pumps  
A Roots vacuum pump stator is arranged to house a pair of intermeshing rotors, said stator being characterized in that it comprises a director or deflector arranged to direct solid material...
8496303 Pump assembly  
A pump assembly including a housing, a pump unit having a low pressure portion and a high pressure portion and accommodated in a pump unit receiving portion which is formed in the housing, a...
8496457 Metering gear pump with integral flow indicator  
A gear pump includes a driven gear and an idler gear each mounted for rotation in a housing. The driven gear and the idler gear include respective gear teeth in a meshing relationship and forming...
8496444 Water-lifting pump apparatus and method of controlling operation thereof  
A water-lifting pump apparatus which is free of a discharge valve and a check valve, is low in cost, and is capable of reducing vibration and noise due to a waterfall after the end of water pumping...
8496456 Progressive cavity pump including inner and outer rotors and a wheel gear maintaining an interrelated speed ratio  
A progressive cavity pump includes at least one inner rotor with Z external threads and at least one outer rotor with Z+1 internal threads. The outer rotor has radial bearings at both ends, whereas...
8491695 Iron-base sintered part, manufacturing method of iron-base sintered part and actuator  
An iron-base sintered part having high density and totally enhanced strength, toughness and abrasion resistance, a manufacturing method of the iron-base sintered part, and an actuator are...
8491288 Geroller hydraulic motor with anti-cogging structure  
A hydraulic motor receives pressurized fluid from a source controlled by a human operator to convert the energy in the hydraulic fluid to a rotational output to propel a drive wheel of a machine....
8491289 Friction drive pump for transfer cases, etc  
A pump having an actuator mounted on a rotatable shaft, and a pump mounted on the shaft, which is selectively engageable with the actuator. When the actuator is actuated, the pump will receive...
8485802 Pump with multiple volume streams  
Disclosed is a pump for generating at least two volume flows having a different pressure. Said pump comprises a pump cover, a pump housing, and a wheel set that is eccentrically mounted therein....
8485803 Scroll compressor comprising oil separating driving shaft  
The present invention relates to a scroll compressor, with an oil-separating drive shaft, that comprises a housing a fixed scroll which is installed inside the housing, a orbiting scroll which...
8485805 Rotary compressor  
A rotary compressor is provided. A suction hole is formed through a middle plate of the compressor to distribute refrigerant into both upper and lower cylinders. Coupling bolts having an...
8485804 Single screw compressor structure and method of assembling single screw compressor including the same  
A single screw compressor structure includes a screw rotor and a casing, which houses the screw rotor. A tapered outer circumferential surface of the screw rotor has a plurality of helical grooves,...
8480386 Vane for a single-vane vacuum pump  
The invention relates to a vane for a vane pump, in particular a vane vacuum pump, having a crucible-shaped housing and provided with a rotor mounted eccentrically and rotatably in the housing,...
8479379 Roots-type blower rotor alignment apparatus  
Roots-type blowers with helical cycloidal rotors exhibit variation in leakback flow with angular position intrinsic to these rotor geometries. Calibration of individual blowers using a combination...
8475151 Compressor  
A compressor is provided with a substantially cylindrical housing. Inside the housing is a motor housing having a substantially cylindrical shape and a compressor housing having a substantially...
8475150 Internal gear pump for a brake system  
The invention relates to an internal gear pump for a brake system, in the pump housing of which an internally toothed ring gear and a pinion meshing with the toothing of the ring gear are pivotally...
8475149 Scroll fluid machine having multiple discharge ports  
A scroll fluid machine that suppresses fluctuations in a port aperture area during each revolution of an orbiting scroll. Suction ports for sucking in a working fluid are disposed on a second base...
8475140 Dual volume-ratio scroll machine  
A compressor may include a shell, first and second scroll members, and a first annular seal. The first scroll member may be supported within the shell and may include a first end plate having a...
8475148 Scroll compressor having through holes with a set depth  
There is disclosed a scroll compressor which can lower the noise level of a harsh frequency without taking a lot of troubles. In a sealed container, a scroll compression element and an...
8469683 Variable-displacement vane oil pump  
A variable-displacement oil pump wherein between a projection of a mobile ring and a corresponding driving chamber and between a protrusion (again of the mobile ring) and a corresponding guiding...
8469684 Rotary vacuum pump with a discharge compensating channel  
A rotary vacuum pump includes a suction chamber (12) in a housing (10). A rotor (14) is eccentrically mounted in the suction chamber (12). Sliding vanes (18) are connected to the rotor (14)....
8465269 Dry vacuum pump including a lubricating fluid sealing device and a centrifuge element equipping such a device  
The invention pertains to a dry vacuum pump comprising at least one rotating shaft (11) mounted on at least one lubricated bearing (5) and at least one sealing device (9) for sealing off...
8465133 Ink pump with fluid and particulate return flow path  
A bidirectional sealless ink pumping system used in an inkjet printing device includes a liquid ink reservoir and a pump. The pump moves ink from the reservoir through a pumping chamber to supply...
8464425 Process for manufacturing a single-piece blisk with a temporary blade support ring removed before a milling step  
A process for manufacturing a single-piece bladed disk, including: using an abrasive water jet to cut a block of material, so as to create blade preforms extending radially outwards from a disk,...
8459972 Bi-rotational hydraulic motor with optional case drain  
A bi-rotational hydraulic motor having a selectively pluggable case drain with check valves incorporated into the thrust plate allowing excess lubrication fluid to pass from the bearings into the...
8459969 Screw fluid machine  
A screw compressor has a balance bearing whose outer ring is movable relative to the casing. A balance piston divides a balance cylinder into a high pressure fluid chamber and a low pressure fluid...
8459971 Scroll compressor with balancer and oil passages  
A scroll compressor including a stationary scroll formed with a scroll wrap, an orbiting scroll formed with a scroll wrap, a rotating shaft for putting the orbiting scroll into an orbiting motion,...
8459974 Six-blade biaxial rotary positive-displacement pump  
A six-blade biaxial rotary positive-displacement pump includes a casing formed with a suction port and a discharge port, a pair of rotors accommodated in the casing and having rotor shafts...
8459970 High pressure pump of variable displacement  
A variable-volume pump comprises one or more reciprocating pistons within respective reciprocating cylinders. The phase relationship between the reciprocating piston(s) and the reciprocating...
8459973 Vane pump having an oil supply passage communicating with a gas passage in the stopping state  
A vane pump 1 has a pump chamber 2A through an axial direction oil supply hole 11a, a diameter direction oil supply hole 11b, and an axial direction oil supply groove 11c of an oil supply passage...
8459963 Screw compressor pulsation damper  
A slide valve for use in a screw compressor comprises a main body portion configured for sliding in a pressure pocket of a screw compressor to regulate output of a working matter through screw...
8454335 Valveless vane compressor  
A vane compressor has a plurality of vanes that are radially translatable and have outer ends. The vanes create zones between each pair of adjacent vanes, each zone having a given area. The vane...
8454334 Lubricant control valve for a screw compressor  
A compressor system includes a lubricant reservoir, a screw compressor, and a valve. The screw compressor includes a housing defining a compression chamber having a suction port, a discharge port,...